Thanks, everyone, for your positive responses! I certainly don't hold this little project up as an example of "how to do it" but I do think the idea is adorable and will probably make another when I figure out how to attach all the pages to a proper binding, as in a real book.
I think toddlers (and parents) would love these soft little books, which can also be washed. Hope any of you who are inspired (not by me but the OP!) to make one will share your photos.